Tire-casing.



J F. PALMER.

TIRE 04mm. APPLICATION PIL'ED OUT. 14, 1907.

Patented June 8,1909.

, CMHFZZJMK fizz,

UNITED sTATEs v F, PALMER, OF CHICAGO, ILLINOIS.

Ale/924,186. V

rsp ific ation of Letters" Patent -17ate tedu nes; 1909.

Application filed October 14, i9 7. Serial swam. l

To all wh om itmay concern; 7

Belt known that 1,; Jonnf F PairMnn, a citizen ofthe Umted States, residingat Chicago, 1n the county of Cookand State of 111i:

5 1101s, have invented certain new. and useful Improvements in Tire-Casings, of which the following is a specification. 1 w My invention relates in; general to pneumatlc tires, and more particularly to an improved tlIe-C-&SlIlg;- a It'has 'been found in practicethat pneumatic' tire casings first break and wear out along parallel longitudinal lines at each side of the tread, owing to the weighti'of'the sup- 1 ported load flattening the tread and thereby forming sharp bends in the casing at each Such sharp bends-in the side of .the tread. casing tend to crush and wear: the strain-re- I sisting fabric, causing. the 'fabriczto 'break' 20- along longitudinal lines at each side .of the tread, and thereby destroying thecasing.

Thelife of a casing is consequently limited to.

the capacity of the strain-resistingfabric'to withstand the wear and tear imposed thereon at each side of the tread.

The primary object of my invention is to provide a tire casing in which the strain-resisting fabric will not be bent at sharp angles at each side of the tread, and wil quen-tly not be broken and crushed.

A further object of my invention is to provide a casing which will be simple in construction and at the same time will possess maximum efficiency and durability.

My invention will be more fully described rhereinafter with reference to the accompanying drawing, in-which thesame is illustrated as embodied in a convenient andpractical form, and in which Figure 1 shows a tire casing partially in side elevation and partially in section Fig. 2, a cross section on an enlarged scale tln'ougl'i my improved casing andarim on which it is supported; Fig. 3," a View sinulautoFig. 2, sho ing a modified form of my invention; and l ig. 4, a detail View of a portion of the band which constitutes the strain-resisting fabric. i

The same reference characters are used-to designate the same parts in the several f gures of the drawings. a

Reference letter A. indicates .the inner skin of the tire casing, which may be made of any suitable'material, as, for instance, stoclnnct 5 frictioned on one Surface hr in H.111 of stocki- CONSP- ne-t, rubberfor canvas may be employed or the inner skin nayxbe entirely omitted.

/ Reference. letter C indicates the straiii i'e sisting i'abric whichis necessarily employed in t re casings, in order that theymay becapable ofresisting the strains to which they are subjected .in use. The Strain-resisting fabricmay consist of canvas, but, preferably,

I employ a strain-resistin of a band composed ofa p uralify ofparallel threads,.such band being wrapped upon the mandrel upon which the tire casing is formed fabric consisting so as to form chords connecteda't their ends to points .on thetread and intermediate of their ends located'tangential to theinner edgeof the casing. v a v A tire casing having. a strain resisting fabric composed of a band consisting of parallel strands, forms the subject-matter of co pendingfapplicationsfiled by me. and, therefore," does not in itself const-itutemy present invention c I Reference letter D indicates aylongitudi nally wound band or hands the tread of the casing and serving to connect and unify the underlying tangentially wound bands forming the strain-resisting fabric C.

E designates the usual outer coating 0 rubber, which is applied around the strainresisting fabric and is then vulcanized,

ln order-to prevent the.strain-resisting fabric G from being sharply bent along longitudinal lines at the opposite sides of the tread, I provide cushions B andB located Within the strain-resisting fabric and serving as supports around which the fabric eXtends. The resilient cushions B and B preferably, consist of strips of rubber which are laid upon the inner skin A in constructing the tire and upon which the strain-resisting fabric is wound. The cushion strips 13 and B prevent the casing from beingbent sharply at each side of the flattened tread portion, and consequently prevent such. sharp bends in the strain-resisting fabric as would tend to crush and break the threads of such fabric.

Whilemy improvement may be embodied in a tire casing, the strain-resisting fabric of which is canvas, yet it is particularly advantageous when applied to a tire. casing, the strain-resisting fabric in which is composed of bands of parallelstrands, as the strands are more liable to be broken and crushed at each side of the treadthan are the threads of a canvas fabric.

extending around tire casing,

. this figurereference characters I), 1) indicate the elastic cushionswliich are so located as to permit the tire casing to have a substantially circular internal cross section. In the modified form of my invention shown in Fig. 3,

the strain resistingfabric is so embedded in theccasing as to lie nearer the outer surface thi eof at each side of the tread, thereby permitting the location of the longitudinal cushions Within the strain resisting fabric Without obstructingsthe circular internal cross section of the opening in the tire casing.

Reference letter F indicates a rim provided with side flanges F and'F upon which-the tire. casing is supported.

It will, of course, be understood that my invention may be embodied in other forms of tire casings than those herein illustrated, and also'that a tire casing embodying my invention may be gsupported upon any suitable construction of rim.

From the foregoingdescription, it will be observed that I have Invented an 1m roved which will not the strain resisting fa ric of be sharply bent at each side of the tread and will, therefore, not be subjected to crushing and breaking strains. My imrovement, therefore, increases the durabilityof a tire casing, by stren thening it where it'would otherwise be first roken.

What I claim is:

1. In a tire casing, the combination with an outer covering, a strain-resisting fabric embedded in the casing, and a non-metallic resilient cushion-located between the strainthe strain-resisting fabric and minimize the bends therein.

2. In a tire casing, the combination with an outer covering, a strain-resisting fabric, and longitudinal non-metallic flexible supports located at each side of the tread adhering to the strain-resisting fabric and located between the strain-resisting fabric and e inner air tube.

3. In a tire casing, the combination with an outer covering, a'strain-resisting fabric composed of se arate threads embedded in silient cushions located at each side of the tread upon which said fabric is su ported. JOHN F. PA MER.

it-nesses:

GEO. L.-W1LK1NsoN, ANNA L. Savors.

resisting fabric and the air tube to support.

the casing,'and ongitudinal non-metallic rc- 

